Symmetricom 5071A, Operating And Programming Manual

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Appendix A Performance Tests
5071A Complete Performance Tests
154 Operating and Programming Manual
Specifications
Standard Unit: ± 1 10
-12
High Performance unit: ± 5 10
-13
The accuracy of the 5071A is better than 5 10
-13
(High Perf) or 1 10
-12
(standard
unit). Be sure the accuracy of the reference standard is known with sufficient
precision to make this measurement accurately.
Procedure
1 The 5071A must be on for at least 30 minutes and the green continuous operation
LED must be on.
2 Connect the HP/Agilent K34-59991A Phase Comparator OUTPUT terminals to
the strip chart recorder as shown in Figure A-7. Set the recorder for 1V full scale
and 1 inch/hour, and turn on the recorder.
3 Turn on the K34-59991A power.
4 Connect the 10 MHz reference to INPUT A and the 5071A (unit under test) 10
MHz to INPUT B as shown in Figure A-7.
5 Set K34-59991A ZERO-OPER-FULL front panel mounted toggle switch to
ZERO. Adjust the ZERO SCALE control for a zero reading on the meter. Then
adjust the recorder for a zero indication.
6 Set K34-59991A switch to FULL and adjust FULL SCALE control for a full
scale reading on the recorder.
7 Check both ZERO and FULL SCALE settings on the recorder and readjust if
necessary.
8 Set K34-59991A switch to OPER for normal operation.
9 The recorder now provides a continuous record of the phase difference between
the reference standard and the 5071A unit under test. When its output reaches full
scale (360 degrees), the K34-59991A will automatically reset to 0 (0 degrees).
10 With the recorder set as described, the phase record is 100 ns full scale (with 10
MHz inputs). The figure below shows an example of a frequency difference
measurement under these conditions.
NOTE